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Q138634: Error Message: Modem is Busy or Not Responding

Article: Q138634
Product(s): Microsoft Windows 95.x Retail Product
Version(s): 95
Operating System(s): 
Keyword(s): win95
Last Modified: 17-DEC-2000

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The information in this article applies to:

- Microsoft Windows 95 
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IMPORTANT: This article contains information about editing the registry.
Before you edit the registry, you should first make a backup copy of the
registry files (System.dat and User.dat). Both are hidden files in the
Windows folder.

SYMPTOMS
========

When you try to dial by using Online Registration, HyperTerminal, or MSN, The
Microsoft Network, you may receive the following error message:

  Modem is busy or not responding.

CAUSE
=====

You may receive the error message if any of the following conditions are true:

- The port is being controlled by another communications program.

- The port settings are in conflict with another device.

- The registry contains incorrect or damaged communications settings.

RESOLUTION
==========

If the port is being controlled by another communications program, close the
other communications program.

This situation usually occurs when a 16-bit program is open (possibly minimized).
The only way that multiple programs can use the port is for the controlling
program and the requesting program to be TAPI aware. The TAPI specification
allows for the controlling program to relinquish control of the port to the
requesting program.

If the port settings are in conflict with another device, follow these steps:

1. Click the Start button, point to Settings, and then click Control Panel on
  the menu that appears.

2. In Control Panel, double-click the Systems icon.

3. In Systems Properties, click the Performance tab, and then click Graphics.

4. In Advanced Graphics Settings, move the Hardware acceleration slider to None.

By default, COM1 and COM3 use IRQ4, while COM2 and COM4 use IRQ3. If another
device is sharing the IRQ of the port, you need to change the IRQ of the
conflicting device. Hardware conflicts can also occur with the I/O address of
the COM port. The 8514a video chip or its clones (S3 chip set) on some video
cards create a conflict with COM4 because they use the same address of 02E8.

If the Windows 95 Registry contains incorrect or corrupt communications settings,
follow these steps:

1. Click the Start button, point to Settings, and then click Control Panel on
  the menu that appears.

2. In Control Panel, double-click the Modems icon.

3. In Modems properties, click the modem, and then click Properties.

4. Click the General tab, and then click the Only Connect At This Speed check
  box to clear it.

5. Click the Connection tab, and then click the Disconnect A Call If Idle check
  box to clear it.

6. Click Advanced, and then click the Use Flow Control check box to clear it.

7. Click OK or Close until you return to Control Panel.

If you are having problems with a Compaq modem, contact Compaq to inquire about
obtaining a file that may correct this problem. Follow the instructions in the
Readme.txt file included in this file.

If you still receive the "Modem is busy or not responding" error message after
you complete these troubleshooting tips, follow these steps.

NOTE: For information about how to edit the registry, view the Changing Keys And
Values online Help topic in Registry Editor (Regedit.exe). Note that you should
make a backup copy of the registry files (System.dat and User.dat) before you
edit the registry.

WARNING: Using Registry Editor incorrectly can cause serious problems that may
require you to reinstall Windows 95. Microsoft cannot guarantee that problems
resulting from the incorrect use of Registry Editor can be solved. Use Registry
Editor at your own risk.

1. Make a copy of your registry by typing the following command at an MS-DOS
  prompt:

  " CD\<windows folder> (where <windows folder> is the name of your
  Windows folder)
  ATTRIB -R -A -S -H System.dat
  COPY System.dat SYSTEM.PSS
  ATTRIB +R +A +S +H System.dat " (without the quotation marks)

2. On the Desktop, click the Start button, and then click Run.

3. In the Open box, type "Regedit" (without the quotation marks).

4. In Registry Editor, double-click each of the following items:

     HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class\Modem\ 
     0000\Settings

5. Under Name, using the right mouse button, click FlowControl_Hard, and then
  click Modify on the menu that appears. In Edit String, delete the data under
  Value data.

6. Under Name, using the right mouse button, click InactivityTimeout, and then
  click Modify on the menu that appears. In Edit String, delete the data under
  Value data.

7. Under Name, using the right mouse button, click SpeedNegotiation_On, and then
  click Modify on the menu that appears. In Edit String, delete the data under
  Value data.

  NOTE: Do not delete the Value name; delete only the Value data.

STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Windows 95. We are
researching this problem and will post new information here in the Microsoft
Knowledge Base as it becomes available.

Additional query words: win95 wincomm awfax ras wintapi rna modem dun

======================================================================
Keywords          : win95 
Technology        : kbWin95search kbZNotKeyword3
Version           : 95

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